Personally I think the MU response to first contact is more likely.
Same here, and even if it didnt straight away its likely the first set of aliens to suggest anything in our history didnt quite
happen the way certain books say it did, there would be war.
I thought the Enterprise crew were fairly diverse, Starfleet Command we only saw a handfull of senior officers and a couple of security guards. If you watch any of the series the crews sometimes look fairly non diverse if your only paying attention to skin colour.